Subversion Repositories Kolibri OS

Rev

Rev 4358 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 4358 Rev 5063
Line 440... Line 440...
440 
 * Return 0 if no bits set.
 440 
 * Return 0 if no bits set.
441 
 */
 441 
 */
442 
#ifndef FFS_DEFINED
 442 
#ifndef FFS_DEFINED
443 
#define FFS_DEFINED 1
 443 
#define FFS_DEFINED 1
Line 444... Line -...
444 
 
 - 
 
445 
#if defined(_MSC_VER) && _MSC_VER >= 1300 && (_M_IX86 || _M_AMD64 || _M_IA64)
 - 
 
446 
unsigned char _BitScanForward(unsigned long* Index, unsigned long Mask);
 - 
 
447 
#pragma intrinsic(_BitScanForward)
 - 
 
448 
static INLINE
 - 
 
449 
unsigned long ffs( unsigned long u )
 - 
 
450 
{
 - 
 
451 
   unsigned long i;
 - 
 
452 
   if (_BitScanForward(&i, u))
 - 
 
453 
      return i + 1;
 - 
 
454 
   else
 - 
 
455 
      return 0;
 - 
 
456 
}
 - 
 
457 
#elif defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86)
 - 
 
458 
static INLINE
 - 
 
459 
unsigned ffs( unsigned u )
 - 
 
460 
{
 - 
 
461 
   unsigned i;
 - 
 
462 
 
 - 
 
463 
   if (u == 0) {
 - 
 
464 
      return 0;
 - 
 
465 
   }
 - 
 
466 
 
 - 
 
467 
   __asm bsf eax, [u]
 - 
 
468 
   __asm inc eax
 - 
 
469 
   __asm mov [i], eax
 - 
 
470 
 
 - 
 
471 
   return i;
 - 
 
472 
}
 - 
 
473 
#elif defined(__MINGW32__) || defined(PIPE_OS_ANDROID)
 444 
 
474 
#define ffs __builtin_ffs
 - 
 
Line 475... Line 445...
475 
#endif
 445 
#define ffs __builtin_ffs
Line 476... Line 446...
476 
 
 446 
 
477 
#endif /* FFS_DEFINED */
 447 
#endif /* FFS_DEFINED */